<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name" />
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number
          v-model="teacher.sort"
          controls-position="right"
          min="0"
        />
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师" />
          <el-option :value="2" label="首席讲师" />
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" />
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea" />
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar" />
        <!-- 文件上传按钮 -->
        <el-button
          type="primary"
          icon="el-icon-upload"
          @click="imagecropperShow = true"
          >更换头像
        </el-button>

        <!--
v-show：是否显示上传组件
:key：类似于id，如果一个页面多个图片上传控件，可以做区分
:url：后台上传的url地址
@close：关闭上传组件
@crop-upload-success：上传成功后的回调 -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API + '/eduservice/oss/uploadFile'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"
        />
      </el-form-item>

      <el-form-item>
        <el-button
          :disabled="saveBtnDisabled"
          type="primary"
          @click="saveOrUpdate"
          >保存</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import { saveTeacher, updateTeacher, findTeacherById } from "@/api/teacher";
import ImageCropper from "@/components/ImageCropper";
import PanThumb from "@/components/PanThumb";

const defaultForm = {
  name: "",
  sort: 0,
  level: "",
  career: "",
  intro: "",
  avatar: "http://eric123.oss-cn-shanghai.aliyuncs.com/2021/04/18/8ccef02d-21a4-45c4-bc37-221b834b993cfile.png",
};

export default {
  components: { ImageCropper, PanThumb }, //声明额外的组件
  data() {
    return {
      BASE_API: process.env.BASE_API, //接口地址值
      imagecropperShow: false,
      imagecropperKey: 0,
      teacher: defaultForm,
      saveBtnDisabled: false, // 保存按钮是否禁用,
    };
  },
  created() {
    this.init();
  },
  watch: {
    $route(to, from) {
      this.init();
    },
  },
  methods: {
    //实现添加和修改使用同一个表单
    saveOrUpdate() {
      if (!this.teacher.id) {
        this.addTeacher();
      } else {
        this.updateTeacher();
      }
    },
    //根据id查询
    getTeacherById(id) {
      findTeacherById(id).then((response) => {
        this.teacher = response.data.eduTeacher;
      });
    },
    init() {
      if (this.$route.params && this.$route.params.id) {
        const id = this.$route.params.id;
        this.getTeacherById(id);
      } else {
        //表单数据清空
        this.teacher = { ...defaultForm };
      }
    },
    addTeacher() {
      saveTeacher(this.teacher)
        .then((res) => {
          return this.$message({
            type: "success",
            message: "添加成功",
          });
        })
        .then((res) => {
          this.$router.push({ path: "/teacher/list" });
        })
        .catch((err) => {
          console.log(err);
          this.$message({
            type: "error",
            message: "添加失败",
          });
        });
    },
    updateTeacher() {
      updateTeacher(this.teacher)
        .then(() => {
          return this.$message({
            type: "success",
            message: "修改成功",
          });
        })
        .then(() => {
          this.$router.push({ path: "/teacher/list" });
        })
        .catch((err) => {
          this.$message({
            type: "error",
            message: "修改失败",
          });
        });
    },
    //上传成功
    cropSuccess(data) {
      //获取后台返回图片地址,显示到页面中
      this.imagecropperShow = false
      this.teacher.avatar = data.imageUrl
      this.imagecropperKey=this.imagecropperKey+1
    },
    //关闭上传组件
    close() {
      //关闭弹框
      this.imagecropperShow = false
      this.imagecropperKey=this.imagecropperKey+1
    },
  },
};
</script>
